Actual position values validation error
Bosch Rexroth · IndraDrive MPx02
What does F3117 mean?
This non-fatal safety error indicates a discrepancy or inconsistency detected in the actual position values used for safety functions on the IndraDrive MPx02. This means the drive's safety logic cannot confirm the true position, potentially compromising safe motion or position monitoring.
Common Causes
- Mismatch between the primary and secondary encoder feedback signals (e.g., encoder 1 vs. encoder 2).
- Encoder fault or damage leading to incorrect position feedback.
- Interference or noise on encoder signal lines.
- Incorrect scaling or parameterization of encoder feedback for safety functions.
- Mechanical slippage between the motor and the load, or between the encoder and the motor/load.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Compare the actual position values from both primary and secondary encoder systems (if dual encoder system is used) to identify the discrepancy.
- 2
Inspect encoder wiring for proper shielding, secure connections, and damage. Check for electromagnetic interference near encoder cables.
- 3
Verify encoder parameters in the IndraDrive MPx02 (e.g., S-0-0192, S-0-0193) for correct scaling and resolution.
- 4
Perform an encoder test or recalibration to ensure accurate position measurement.
- 5
Check for any mechanical issues causing slippage, such as loose couplings, worn belts, or binding mechanics, that could lead to position discrepancies.